Solvent Yellow 56 is an oil-soluble azo dye that produces a strong, reddish-yellow shade. It is particularly valued for its good heat stability and its excellent solubility in various nonpolar media. This makes it a popular and cost-effective choice for coloring mineral oils, industrial waxes, and greases. It is also widely used for coloring various plastics, especially polystyrene, where a warm, vibrant yellow is desired.
